Tire changer



C1 VA. CLARK TIRE CHANGER Oct. 23 1923. Y 1,471,591

Filed Feb. 8. 1922 2 sheets-sheet 1 Zr L i Y 5 -4 z: .I

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wuaMo'b @www @lgwm Oct. 23, 1923. 1,471,591

C. 'A. CLARK TIRE CHANGER 'Filed Feb. a. 1922 2 sheets-sheet 2 Y changer. Y j

Figure 2' is a fragmentary side view show-` To all whom tlmdg/ concern.'

Patented @et 23,` 19.23. y n i- CHESTER ALVIN enna-K, or OAKLAND, CALIFORNIA. 'i

" TIRE CHANGR.

' applicati@ med rebrary s, 19:22.- serial 110,535,101.

ABe it known that I. CHESTERA ALVIN CLARK, a citizen 'ofthe yUnited States, re-

' siding at Oakland. in they county ot Alamedaand State ofCailifornia, havefinvented 'certain` new and useful.,Improvements in.

Tire Changers,of whichthe following is a specification. .l i

My invention is a tire changer, particularlypusetul in .'garages, whiclrmay. be elii- 'ciently operated with a small amount of manual force. Y 'c ReferringV to the annexed drawings whichmyinvention is illustrated and kwhich forms a part ont thisspecification:` i

Figure 1 is an elevation of tire ing a p'air of-therim grip arms and the grip in vertical section carried by Vsaid arms.V n Figure 3 is av rear elevation of one of the rim grips. y Figure' 4 is a fragmentary horizontal section of my` tire changer taken on line 4-4 of Figure 1, showing the upper nut to which the upper rim grip arms are pivotally connected.

Figure 5 is a fragmentary horizontal section of my tire changer taken on line V5-5 of Figure 1 showing the frame'on which th rim joint grip lever is fulcrumed.

In the drawing 1 indicates a circular base Y mounted on legs 2. Vertical parallelstandardsf3 are secured at theirlower ends concentrically equi-distant apart to the disk 1 and at their upper ends to a head 4. A vertical screw 5 is j ournaled at its lower end centrally inthe basel and at its upper end centrally in thexhead 4, and a hand wheel 6 is secured onthe upper end of said screw above said head Vfor rotating the screw. kNuts7 and 8 screw on the screw-5 between the base 1 and the head 4, the nut 8 being above thenut 7 A 'frame 10 is clamped on vtwo of the standards `3,.said frame including a bearing 11 midway between the'ends ofsaid frame through which oneo the rodsv 3 extends, and two lclamps -12 on' the endsgof said frame, respectively, through whichj clamps extendtwo standards 3, on which standards said clamps are clamped to `secure the frame 10 on the standards 3 at any desired elevation. tending ears 13 are formed on the frame 10 at the bearing 11; On Ythe nut 7 are formed four pairs of radial ears l4spaced at 90 bolt 41.

A pair of outwardly eX*y apart, in each of which pairlfof ears is `pivotithrough' which ears extend the standards 3 for preventing said nutfrom turning on the screw. Ears 18 are formed on the nut- `8 through whichextend the standards'3for preventing said nut from turningon the screw. On said'nut are formedfour pairs of radial ears 19 spaced 90 apart, in each y kof which pair otears is pivoted theupper end 'of an arm 20 by means of a bolt 21.

Rim grips 25, each comprise a vertical elongated b'earing 26, alowerfxed jaw 27 and an upperniovableV jaw 28 which is secured to the upper endof a rod L29 slidablein said bearing, said'movable -jaw being normally held in its lowermostfposition against `the Y upper end ofsaidbearingfbyf'aspring 30 surroundingthe `lower end of rod 29 in a recess 31 in the lower end of said bearing and bearing at. its upper end against the upper end of said recess and at its lower end against a collar 32 on the lower endof said rod, whichcollar is held on the rod by a cotter pin 33 upon which the collar rests. Each rim grip 25 is mounted on the upper end of an arm 15 and the lower endof an arm 20, said arms being respectively pivoted at their upper and lower ends ybetween a pair of ears 34 on the rear of the grip bearing 29 by pivot bolts 35 and 36. Y Intermesh-j ing gear teeth 37 and 38 are formed on each pair of arms 15 and20 which are connected to a rim grip 25 to maintain the bearing 29 ofthe Vgrip vin vertical' position. A lever 40 is'fulcrumed between the ears 13 by a pivot Arlink 42 is pivotally connected at one end to the lower end of lever 41. A

flanges by` the jaws 27 and 28, the grip'sbeing adjusted totheV diameter of the rim by T pair of jaws 43 and 44 are pivoted inthe rotating the screw Vwhich moves the nuts 7 andf8 upor down and the grips outwardly plied to the rim at the joint. Thelever 40 is swung outwardlywhich breaks the joint Yof the rimandthe screw' is' rotated by the j 'hand wheel 6 to move the'y nuts 7 and 8 away first als above described; the) tire is then slipped over the rim andthe screw 5 rotated to force the grips outwardly and theU rim anges over theV beadsof'the'trev whil'e the lever 40 is swung inwardly to set the joint of the rim.

`Having described my1 invention, l claim:

1. A tire changer including a base, standv` ardssupstandingiroin said base, a headl `secured t0 .thez upper ends of saidstandards,l al

screw journaled atitsr lower eiidjin said-base and atVV its upper end in said head, twodnuts on said screw, yarms pivoted atvone end to one-',ofvsaid nutsrim grips, each arm being pivoted at itskother end of one of said grips, arins pivoted atone end tothe vother nut and at their other end to saidgripsrespeetiyely,ears on said'nutsftl'irou''gli4 which said standards extend, and means for engaging the rim4 at'the jointor'breaking-or setting the'lo/ntF v ,.1 j L f i,

`2. A tire changer including a plurality nof grips-,for grippinglthe tirejrim, toggle means for forcingfsaid' grips horizontally inwardly or-outwardl`yymeans for gripping the rim gripffincludingf abear-ing; -a fixedl jaw on said screw journaled at its lower end in said base belaringf a rodY slidab'l' iri 'saidi bearing, a inovablegaw on said rod, and 'a 'spring surrounding said rod for normally holdingsaid ni'ov'able jaw against' theend of the bearing.

3. yAl tire changer including a base, standardsA upstanding from said base, a head securedrto the upper ends of said standards, a

and at its upper end in saidhead, two nuts, on said screw, arms pivotedatfone end to one of said nuts, rim grips, each gripbeing i pivoted to the other end of one of said arms, arms pivoted to the other nutat one end and l at their other end to'said grips respectively,

ears k'oni said nuts through which said stand'- ards eXtend, a frame, a bearing' on ysaid fra-nie through which one of said rods eX- tends,'clainps oii said frame which engager .other standards, a lever pivoted to said 

